// create image and load external data
imgSrc = vgCreateImage(VG_A_1, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, VG_IMAGE_QUALITY_NONANTIALIASED);
vgImageSubData(imgSrc, (const void *)imgBarbaraAlphaData, imgBarbaraAlphaDataStride, imgBarbaraAlphaFormat, 0, 0, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight);

#if defined(OPENVG_VERSION_1_1)
for (j = VG_sRGBX_8888; j <= VG_A_4; ++j) {
#else
for (j = VG_sRGBX_8888; j <= VG_BW_1; ++j) {
#endif

	imgDst = vgCreateImage(j, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, VG_IMAGE_QUALITY_NONANTIALIASED);
	vgCopyImage(imgDst, 0, 0, imgSrc, 0, 0, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, VG_TRUE);
	vgGetImageSubData(imgDst, imgOutputDataRGBA, imgBarbaraAlphaDataStride, imgBarbaraAlphaFormat, 0, 0, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight);

	strcpy(imgFileName, "imgconv_A1_to_");
	strcat(imgFileName, imageFormatToString(j));
	strcat(imgFileName, "_dither.png");
	strcpy(testDesc, "Image conversion from A_1 format to ");
	strcat(testDesc, imageFormatToString(j));
	strcat(testDesc, " format, with dithering.");

	// pixel format without alpha channel will be saved forcing alpha to 0xFF
	switch (j) {
		case VG_sRGBX_8888:
		case VG_sRGB_565:
		case VG_sL_8:
		case VG_lRGBX_8888:
		case VG_lL_8:
		case VG_BW_1:
			saveImage32(f, imgFileName, testDesc, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, imgOutputDataRGBA, 1);
			break;
		default:
			saveImage32(f, imgFileName, testDesc, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, imgOutputDataRGBA, 0);
	}
	vgDestroyImage(imgDst);
}

vgDestroyImage(imgSrc);